Multiple vulnerabilities in D-Link DIR-867, DIR-878 and DIR-882 routers



Published: 2020-02-25
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-8863
CVE-2020-8864
CWE-ID CWE-303
CWE-697
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe
DIR-867-US
Hardware solutions / Routers & switches, VoIP, GSM, etc

DIR-878
Hardware solutions / Routers & switches, VoIP, GSM, etc

DIR-882-US
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor D-Link

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Incorrect Implementation of Authentication Algorithm

EUVDB-ID: #VU25572

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8863

CWE-ID: CWE-303 - Incorrect Implementation of Authentication Algorithm

Exploit availability: No

Description

The vulnerability allows a remote attacker to to bypass authentication process.

The vulnerability exists due to a lack of proper implementation of the authentication algorithm within the handling of HNAP PrivateLogin login requests. A remote attacker on the local network can bypass authentication and reset the admin password.

An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the router.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

DIR-867-US: v1.10b04

DIR-878: v1.20b03_Hotfix

DIR-882-US: v1.10b04


CPE2.3 External links

http://www.zerodayinitiative.com/advisories/ZDI-20-267/
http://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10157

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Incorrect Comparison

EUVDB-ID: #VU25573

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8864

CWE-ID: CWE-697 - Incorrect Comparison

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a lack of proper handling of empty passwords within the handling of HNAP strncmp login requests. A remote attacker on the local network can bypass authentication and reset the admin password.

An attacker can leverage this vulnerability to execute arbitrary code on the router.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

DIR-867-US: v1.10b04

DIR-878: v1.20b03_Hotfix

DIR-882-US: v1.10b04


CPE2.3 External links

http://www.zerodayinitiative.com/advisories/ZDI-20-268/
http://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10157

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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